This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A152069 #5 Jan 13 2020 11:01:57 %S A152069 2,16,240,5424,163180,6193248 %N A152069 Total number of Ucycles on 2n+1 nodes. %C A152069 See reference for precise definition. %H A152069 K. Casteels and B. Stevens, <a href="https://doi.org/10.1016/j.disc.2009.03.002">Universal cycles of (n-1)-partitions of an n-set</a>, Discr. Math., 309 (2009), 5332-5340. %F A152069 a(n) = A152029(n) + A152068(n). %Y A152069 Cf. A152029, A152068. %K A152069 nonn,more %O A152069 1,1 %A A152069 _N. J. A. Sloane_, Sep 15 2009